Taxonomic analysis of the genital plates and associated structures in Ophiuroidea (Echinodermata) Author Stöhr, Sabine 412800EB-AACE-4313-9810-61F89B740405 Swedish Museum of Natural History, Department of Zoology, Box 50007, 10405 Stockholm, Sweden. sabine.stohr@nrm.se text European Journal of Taxonomy 2024 2024-05-14 933 1 98 https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2525/11335 journal article 10.5852/ejt.2024.933.2525 2118-9773 11198874 8F720F2B-BFBC-4CA1-BFF2-A2B8C7C8D3E1 Genus Ophiopsila Forbes, 1843 Fig. 31 Type species Ophiopsila aranea Forbes, 1843 . Examined species Ophiopsila guineensis Koehler, 1914 . Oral GP Flat, elongated, bar-like. V-shaped pair distally at oral shield, meeting row of similar scales continuing to abGP along abradial edge of genital slit. Adradial GP Long, rod-like shaft, distally inflated. Single condyle bordered by shallow groove. As long as five arm segments. Abradial GP Sabre-shaped, flat. Distal edge straight with simple articular surface. Shorter than adGP. Oral shields Oral shield inner side with two knob-like median spurs and proximally thickened. Madreporite externally with two lateral rows of multiple hydropores, inner side thickened, with large opening in distal part, spurs less expressed than in OS. Radial shield Inner side with large distal condyle, bordered by groove, proximal to condyle a round patch of denser stereom.